json - i have some marker, every marker with it's info. window , how can i customize them in one info window on javascript -

i have marker, every marker it's info. window , how can customize them in 1 info window, , every time re-assign data when click on different one? on javascript

self.getcontent = '<div class="window-content" style="background-color:#a0785c;padding:5px;color:#fff;text-transform:uppercase; border-radius:5px;"><div class="title"><h4 style="color:#38c3ea;">' + self.title + "</h4></div>" + '<div class="extrcontent"> ( ' + self.lat + ' , ' + self.lng + " ) </div>" + '<div class="extrcontent"> city ->' + " " + self.city + "</div>" + '<div class="extrcontent"> street ->' + " " + self.street + "</div>" + '<div class="extrcontent">' + self.checkinscount + " checkins </div></div>";     });     self.getcontent = '<div class="window-content" style="background-color:#a0785c;padding:5px;color:#fff;text-transform:uppercase; border-radius:5px;"><div class="title"><h4>' + self.title + "</h4></div>" + '<div class="extrcontent">' + self.city + "</div>" + '<div class="extrcontent">' + self.street + "</div>" + '<div class="extrcontent">' + self.checkinscount + "</div></div>";     // define infowindow      self.infowindow = new google.maps.infowindow({         content: self.getcontent     });     // add , show markers     self.marker = new google.maps.marker({         position: new google.maps.latlng(data.location.lat, data.location.lng),         map: map,         title: data.title,         animation: google.maps.animation.drop,     });     // function show markers on map     this.isvisible = ko.observable(false);     this.isvisible.subscribe(function(currentstate) {         if (currentstate) {             self.marker.setmap(map);         } else {             self.marker.setmap(null);         }     });     this.isvisible(true);     // contect infowindows     self.marker.addlistener('click', function() {         // declare info window         self.infowindow = new google.maps.infowindow({             content: self.getcontent         });         self.infowindow.setcontent(self.getcontent);         self.infowindow.open(map, this);         // set marker animation          self.marker.setanimation(google.maps.animation.drop);     }); };